Xliquid-feeding- d device



Aug. 2s, 19232 w. SPARKS LIQUID FEEDIN DEVICE Filed Aug. is 1921 en on Patented Aug. ZS, l.

UNTEE PATEN? OEElCE.

WILLIAM SPAEFS, OF JACKSCN. ."'IICHIGADL fSSIG-NR, BY MESNE ASSIGNMENTS, TO STEWRT-WARNEB SPEEDOIEETER CORPORATIGN, OF RICHMOND. VIRGINIA, A

CORPORATION or vrneinra.

-Lre-UrD-rnnnrno Dnvron.

Application led August 18, 1921,

1o all felici/t 2 may con ocra ne it known that I, demain Seamus, a citAA oli' the YUnited States. residing at Jackson, in the county of Jackson, in the State ot' Michigan, have invented new and useful improvements in Liquiddleeding ievicesl` ot vvhich the following, taken in connection w: i the accompanying drawings is a full, clear, and exact description.

This invention relates to certain improvements in liquid feeding devices tor use particularly in supplyingl liquid luel to internal combustion engines of automobiles and the like, in connection with which it is very often desirable to have the primary tuel tank carried on the vehicle at a level below the carburetor.

Such tank structures usually embody an upper chamber and a lower chambei` with valved means ot' communication between them tor effectingintermittent discharge trom the upper chamber to the lower chamber when atmospheric pressure exists in the upper chamber.

rilhe primary object ot this invention is to provide a novel means for controlling the siphonic connections between the upper and lower chambers combined with means 'for renewing the siphon to automatically start the operation ot the device. in effecting the intermittent discharge oi liquid :from the upper to the lower chamber.

@ther objects and advantages relato to the d tails ot construction ot the device, all as will niore 't'ully appear troni the 'following description, taken in connection with the aiicompanying drawings` in which l Figure l a vertical sectional view through the tank construction.

Figure 2 is an enlarged sectional view oi the float and its appurtenances which control the siphonic connection.

Figure 3 is a view oi the method ot pivotingr the float which actuates the float valve to effect renewing ot the siphon.

As illustrated, the liquid 'feeding device comprises a tank -l-, divided by a partition WQ* into an upper chamber -3- and a lower chamber -4t-. The upper chamber is provided with the usual liquid inlet connect-ion -39, suction connection l0- and atmospheric connection Al-1 The suction connection is controlled by valve wei mounted apen a 'floatstein 5M Serial No. 493,497.

which moves in conjunction with the float -G- disposed in the chamber -B, while the atmospheriiivent lllis controlled by a valve "7 actuated by a .lever -8- adapted to be moved by spring -9- which has its outer end connected to the lever ES- and itsinner end connected to the float stein -5--, that as the float stern moves the spring -QM to opposite sides ot' the pivot -l0- ot' the lever -8- the valve -7- will be snapped to open or closed posit-ion, in accordance with the position ot the float. An additional spring -l1 is provided connected to the lloat and to an extending projection -12- for balancing the spring lThe construction and operation ot these parts of the device are the same as those shown in Letters Patent No. 1,255,847" issued to lVillia-m Sparks under date of February 5, 1918. The connection between the chamber 4.- irom which liquid is adapted to be discharged by `ravity through a pipe *13* to any suitable consuming device as the carburetor, is effected by means ol the Siphon tube "la which preferably extends to substantially the lower part ot the chair-iber 1l-m, and penetrates the partition wall -2-. The other end of this siphon terminates in chamber 3 and is provided with a valve chamber #l5-- which contains a :float valve -lG- which may be oi cork. or any other suitable material adapted to be buoyed by the liquid in chamber so as to automatically open the passage -lwhen atmospheric condition exist iu chamber El. To prevent the float Yt'rom closing` the siphon when it is moved upwardly by the buoyancy ot' the liquid the leg- -18- preterably penetrates the valve easing -i5 and extends some distance into the valve casing` and is provided with a series of recesses 19 in its lower cud Forming means oi communication between the siphon lege-1S* and the valve chamber l 5-.

A normal level ot liquid is maintained by this structure in chamber -3- so as to keep the float 2l-- in a position shown in Figure l so that the projection 22- does not interfere with the closing' of the float valve JAS- by gravity. This float Q1- is preferably mounted upon a stem pivoted in journals 23M carried by the lower end "the rear tanlr until the mot-or stops.

et the valve easing l5- and has a projection -22- adapted to lie in the position shown in Figure l, or when the level of: liquid is such that the float 21 is not A`intinta-.ined .in the Vposition shown in Figure piposition, so that the suction produced in the upper chamber will elevate theliquid "from the chamber #4- through the Siphon tube into chamber i3- until sufficient liquid has been raised in. the chamber --3n so as ,to move ,the float -21- to the position shown in Figure l. or to such a position'that the projection Q2- does not lie in the path of the closingmovement of the float valve -l6-. In other Words, if the normal level of liquid is .not maintained in chamber -3-, the Siphon will be renewed vby elevation of liquid through the siphon tube into the chamber -3-, and from that point on all liquid fuel will be drawn from Wvhen the motor starts again the siphon is renewed in the fsame manner.

It Will be understood that the connection or the chamber -8- with the suctionline and the atmospheric vent depends upon the position of the float 64, and, therefore, upon the amount tot vliquidinch-amber 3H the operation of this construction being` Well known in the art. The valve 1G- is held in. 'closed 'position by the suction. during-` the existence of vacuum in the chamber and upon the production of: atmospheric pressure therein7 is raised from its seat by the buoyancy of the liquid.

A normal level of liquid is maintained in the lower chamber 4l-'- above the discharge end of the Siphon tube ifiso that the renewal of the siphon above described can be eilected by elevation of liquid in chamber Jeinto chamber -3- at the starting et the operation of the device7 should that be necessary. e

Although l have shown and described a particular construction as illustrative of a perhapspreferred embodiulent olf my invention, I do not desire to limit niyeeli` to the details of construction or operation of i ease? and means Yfor holding` said heat-valve open when the level of liquid m the upper chamber is below a predetermined point.

2. in a `device ot the class described, an upper chamber `and a' lower chamber, means for maintaining atmospheric pressure in lower chamber, means 'for alternating vacuum and ati'nospheric pressure in the up per chamber,` a Siphon tube .having` one leg terminating in the upper chamber and its other leg; terminating in the lower chamber, a valve casingl associated with the end ot said leg;- terminating in the upper chamber, a float in said chamber adapted to close com munication between Vthe Lupper chamber and said siphontube7 and means for holdin said v4:float in a position to permit communication between the upper chamber and the siphon tube when the' liquid inthe upper chambe below a predetermined level.

A3. ln a. device of the class described, an upper chamber and a lower chamber, means for alternating vacuum. and atmospheric pressure in the upper chamber and a siphon tube connecting` saidchambers and having; one` leg; terminating' in, the upper i-,hamber and the other -lep terminating)` in the lower cllaiuber, a bu'oyanry-actuated valve controlling conmuinieation olf said siphon with the upper chamber and means `for holding;` said valve open when the level et liquidin th upper chamber is below a n'edeteruiined point, said means comprisingy aI le\ier arm ulcrumed'between its ends -with a float at one end and` with the other end disposed to engage said valve through the port which it governs.

ln Witness whereof l have hereunto set my hand this lith day ei hugiflst, i921..

lVitnesses Lipman l. lVUnnnrcnion, RoLLlN R. Buss. 

